Data center cabinet and reusable transport casters for a data center cabinet

ABSTRACT

A data center cabinet has a base frame with a pair of front vertical posts, first bottom and top side-to-side beams connected to the front vertical posts, a pair of back vertical posts, second bottom and top side-to-side beams connected to the back vertical posts, and front-to-back beams connecting the front vertical posts and back vertical posts. The first and second bottom side-to-side beams each comprise an opening configured to allow a removable transport caster to pass through the opening, a first set of keyholes configured to receive and retain a set of mounting buttons of a first removable transport caster, and a second set of keyholes configured to receive and retain a set of mounting buttons of a second removable transport caster.

CROSS REFERENCE TO RELATED APPLICATION(S)

This application claims benefit to U.S. Provisional Patent ApplicationNo. 63/019,573, filed on May 4, 2020, the entirety of which is herebyincorporated by reference herein.

FIELD OF THE INVENTION

The present invention generally relates to data center cabinets, and,more specifically, to transport casters for data center cabinets.

BACKGROUND

In typical data center cabinets, transport casters are installed on thedata center cabinet at the factory and remain with the data centercabinet. However, since movement of the data center cabinets is limitedonce they have been delivered and positioned, there does not seem to bea need to have permanent transport casters on every data center cabinet.Therefore, it would be beneficial to have data center cabinets that donot have permanent transport casters, but can have transport casterseasily installed and removed in the field to be able to quickly rolldata center cabinets around as needed.

SUMMARY

In one example, a data center cabinet comprises a base frame including apair of front vertical posts, a first bottom side-to-side beam and afirst top side-to-side beam positioned between and connected to the pairof front vertical posts, a pair of back vertical posts, a second bottomside-to-side beam and a second top side-to-side beam positioned betweenand connected to the pair of back vertical posts, a first pair offront-to-back beams positioned between and connected to one of the pairof front vertical posts and one of the pair of back vertical posts, anda second pair of front-to-back beams positioned between and connected tothe other of the pair of front vertical posts and the other of the pairof back vertical posts. The first and second bottom side-to-side beamseach have an opening configured to allow a removable transport caster topass through the opening, a first set of keyholes configured to receiveand retain a set of mounting buttons of a first removable transportcaster, and a second set of keyholes configured to receive and retain aset of mounting buttons of a second removable transport caster.

In another example, a transport caster for use with a data centercabinet comprises a swivel caster and a mounting plate secured to theswivel caster. The mounting plate has a plurality of mounting buttonsextending from a top surface of the mounting plate and is configured tobe received and retained in a plurality of keyholes in the data centercabinet.

In another example, a method of installing a transport caster on a datacenter cabinet comprises the steps of: raising the data center cabinet;inserting the transport caster through an opening in a side-to-side beamof the data center cabinet; inserting a mounting button of the transportcaster through a keyhole in the side-to-side beam; sliding the transportcaster along the side-to-side beam such that the mounting button isretained in the keyhole; and lowering the data center cabinet to rest onthe transport caster.

BRIEF DESCRIPTION OF THE DRAWINGS

Certain examples of the present invention are illustrated by theaccompanying figures. It should be understood that the figures are notnecessarily to scale and that details that are not necessary for anunderstanding of the invention or that render other details difficult toperceive may be omitted. It should be understood, of course, that theinvention is not necessarily limited to the particular examplesillustrated herein.

FIG. 1 is a perspective view of an example data center cabinet;

FIG. 2 is an exploded view of the data center cabinet of FIG. 1 ;

FIG. 3 is a perspective view of the base frame of the data centercabinet of FIG. 1 ;

FIG. 4 is an exploded view of a portion of the base frame of FIG. 3 ;

FIG. 5 is an enlarged partial exploded view of the base frame of FIG. 3;

FIG. 6 is an exploded perspective view of a first example top cap withthe base frame of the data center cabinet of FIG. 1 ;

FIG. 7 is a perspective view of the top cap and base frame of FIG. 6assembled;

FIG. 8 is a partial cross-section of the top cap and base frame of FIG.7 taken along the line 8-8 in FIG. 7 ;

FIG. 9 is a perspective view of the top cap and base frame of FIG. 7with the door rotated to an open position and power outlet unit cordspassing through the apertures in the door;

FIG. 10 is a perspective view of the top cap and base frame of FIG. 7with the door being removed;

FIG. 11 is a partial bottom perspective view of the top cap and baseframe of FIG. 7 with the latches of the door in the extended position;

FIG. 12 is a partial bottom perspective view of the top cap and baseframe of FIG. 7 with the door in an open position and the latchesretained in a retracted position;

FIG. 13 is a perspective view of the top cap and base frame of FIG. 7with optional plates to cover the side openings;

FIG. 14 is a perspective view of the top cap and base frame of FIG. 13with protection bezels and exhaust vents mounted on the plates;

FIG. 15 is an exploded perspective view of a second example top capwithout the door;

FIG. 16 is a perspective view of the top cap of FIG. 15 ;

FIG. 17 is a perspective view of the top cap of FIG. 16 with the door;

FIG. 18 is an partially exploded perspective view of the top cap of FIG.16 with the base frame of the data center cabinet of FIG. 1 ;

FIG. 19 is a partial perspective view of a rear plate of the top cap ofFIG. 15 ;

FIG. 20 is a partial perspective view of the rear plate of FIG. 19 witha grounding clip;

FIG. 21 is a partial perspective view of the top cap of FIG. 16 with aportion of the door in the closed position and engaging the groundingclip of FIG. 20 ;

FIG. 22 is an exploded perspective view of the base frame of the datacenter cabinet of FIG. 1 with example removable transport casters;

FIG. 23 is an exploded perspective view of an alternative base frame ofthe data center cabinet of FIG. 22 with example removable transportcasters;

FIG. 24 is a perspective view of one of the removable transport castersof FIG. 22 ;

FIG. 25 is an exploded perspective view of the removable transportcaster of FIG. 24 ;

FIG. 26 is a perspective view of the base frame of the data centercabinet of FIG. 1 with a removable transport caster aligned over anopening in a bottom side-to-side beam of the base frame;

FIG. 27 is an enlarged view of a portion of FIG. 26 ;

FIG. 28 is the enlarged view of FIG. 27 with the transport casterinstalled on the bottom side-to-side beam;

FIG. 29 is a bottom view of the base frame and transport casters of FIG.22 with the transport casters installed; and

FIG. 30 is a side view of the base frame and transport casters of FIG.29 .

DETAILED DESCRIPTION

The examples shown and described herein provide a data center cabinethaving a top cap that spans the top of the data center cabinet with asingle main panel or with two or more separate components, which canreduce or prevent damage during handling, that together span the entiretop of the data center cabinet. The top cap has two large openingstowards the front of the cabinet that can be used for cabling to passthrough, for venting, etc. and one large opening towards the back of thecabinet, which can be accessed by rotating open or removing a hingeddoor. The hinged door also has one or more cutouts at the edges of thedoor to allow cabling and power outlet units to pass through. When largediameter power outlet unit plugs need to pass through the opening in thedoor, the door rotates open to allow them to pass thru. The example topcaps also include an electrical bonding feature that provides electricalcontinuity between the door and the base frame of the data centercabinet.

The examples also provide transport casters that are easy to install andremove from the data center cabinet and are reusable allowing movementof a large number of data center cabinets from the shipping dock totheir final destination or around a facility with the reuse of thetransport casters, rather than each data center cabinet having its ownpermanently installed transport casters. These transport casters areinstalled underneath the base frame without adding to its overall widthor depth, which maintains the maneuverability of the data centercabinet. In addition, the transport casters fit in the same location asfactory installed casters and, therefore, do not raise the cabinet morethan the set of preinstalled casters would, which speeds up installationand allows the data center cabinets to be maneuvered thru limited heightpassageways.

Referring to FIGS. 1-5 , an example data center cabinet 10 is shown thatgenerally includes a base frame 100 and a front door 15, back door 20,side panels 25, and top cap 200, 300 mounted or attached to base frame100. Front door 15 can be a single door, as shown, that is hinged on oneor both sides with one or more handles, can be a double door that ishinged on the sides and opens in the middle, can be solid or perforated,or can have any other features desired for a particular application.Similarly, back door 20 can be a double door, as shown, that is hingedon the sides and opens in the middle, can be a single door as describedabove, can be solid or perforated, or can have any other featuresdesired for a particular application. Side panels 25 one each side ofdata center cabinet 10 can be a single panel or multiple panels, asshown, can be removably secured to base frame 100, can be solid orperforated, and can have any other features desired for a particularapplication.

As best seen in FIGS. 2-5 , base frame 100 includes a pair of frontvertical posts 102 and a bottom side-to-side beam 104 and topside-to-side beam 120, each positioned between and connected to each ofthe front vertical posts 102, for example by threaded members. The pairof front vertical posts 102, bottom side-to-side beam 104, and topside-to-side beam 120 together define a front picture frame assembly150. Similarly, base frame 100 includes a pair of back vertical posts122 and a bottom side-to-side beam 124 and top side-to-side beam 140,each positioned between and connected to each of the back vertical posts122, for example by threaded members. The pair of back vertical posts122, bottom side-to-side beam 124, and top side-to-side beam 140together define a back picture frame assembly 152.

A top pair of front-to-back beams 142A, middle pair of front-to-backbeams 142B, and bottom pair of front-to-back beams 142C are positionedbetween and connected to corresponding front vertical posts 102 and backvertical posts 122, for example by threaded members 154, to connectfront picture frame assembly 150 to back picture frame assembly 152.

Adjustable equipment rails 148 are connected to top, middle, and bottomfront-to-back beams 142A, B, C on opposite sides of base frame 100 andare configured to receive and retain electronic components within datacenter cabinet 10. Equipment rails 148 can be connected to top, middle,and bottom front-to-back beams 142A, B, C with threaded members, such asscrews or bolts, with a manual locking mechanism, or in any other mannerdesired, but are preferably connected such that equipment rails 148 canbe adjusted forward and backward within data center cabinet 10 to allowthe mounting of electronic components of different sizes.

Adjustable leveling legs 144 are attached to bottom side-to-side beams104, 124 by threading a threaded shaft 146 of each adjustable levelingleg 144 into a corresponding hole 118, 138 in bottom side-to-side beam104, 124. In the example shown, a pair of adjustable leveling legs 144are attached to bottom side-to-side beam 104 and a pair of adjustableleveling legs 144 are attached to bottom side-to-side beam 124 to allowthe leveling and height adjustment of base frame 100 of data centercabinet 10.

Referring to FIGS. 6-14 , a first example top cap 200 is shown that canbe used with data center cabinet 10. Top cap 200 has a single, integral,unitary main panel 202 that spans the entire top of base frame 100 ofdata center cabinet 10 and is attached to base frame 100 by screws 260that extend through holes in main panel 202 and into base frame 100.Main panel 202 has a front edge 206, rear edge 208 opposite front edge206, opposing first and second side edges 210, 212 extending betweenfront edge 206 and rear edge 208, top surface 214 and bottom surface216. A pair of longitudinal side openings 218 in a front portion of mainpanel 202 run substantially parallel to first and second side edges 210,212 and are inset and spaced apart from front, rear, first side, andsecond side edges 206, 208, 210, 212 of main panel 202. Side openings218 can be left open to allow the passage of cables. Alternatively,plates 220, with four separate openings, two separate openings, or asingle large opening, can be secured to main panel 202 over sideopenings 218 (FIG. 13 ), which can be used to attach brush seal stripsto prevent thermal leakage from data center cabinet 10, attachprotection bezels 222 to cover side openings 218, or attach cool boots224 such as Panduit Part No. CTGN3X5 to seal off cabinet top capopenings (FIG. 14 ).

A large rear opening 226 is also formed through a rear portion of mainpanel 202 and is also inset and spaced apart from front, rear, firstside, and second side edges 206, 208, 210, 212 of main panel 202. Aremovable door 234 is hinged to main panel 202 and is positioned overopening 226. Removable door 234 has an outwardly extending flange 238that extends from and is slightly offset from a first end 236 of door234. Flange 238 is positioned under main panel 202 to hinge door 234 tomain panel 202 and allow door 234 to be rotated between an open position(FIGS. 8-9 ) and a closed position (FIG. 7 ) and to also be removed frommain panel 202 (FIG. 10 ). Door 234 also has side and rear cutouts 240in the side and rear edges of door 234, which form apertures 242 betweendoor 234 and main panel 202 that are preferably large enough to passcabling and fit power outlet unit cords through. When large diameterpower outlet unit plugs need to pass through apertures 242, door 234 canbe rotated to an open position to allow passage (FIG. 9 ). Brush sealstrips can also be installed on door 234 and/or main panel 202 to coverapertures 242 to prevent unwanted thermal leakage.

When in the closed position, door 234 is supported by door stop flanges228 that extend from and are offset from main panel 202 and into opening226. Main panel 202 can also have a grounding tab 330 that extends frommain panel 202 into opening 226 and a grounding clip 332 mounted ongrounding tab 330 to provide electrical continuity between main panel202 and door 234 when door 234 is in the closed position, as shown inFIGS. 19-21 and described below with respect to top cap 300.

As best seen in FIGS. 11 and 12 , door 234 can also include one or morelatches 244 that are configured to prevent rotation and removal of door234 when in the closed position. In the example shown, latches 244 areretractable spring loaded pins 246 that are positioned on opposing sidesof door 234. Pins 248 of retractable spring loaded pins 246 extend fromthe opposing sides of door 234 and engage bottom surface 216 of mainpanel 202 to prevent movement of door 234 (FIG. 11 ). Pins 248 can thenbe moved to a retracted position, which disengage pins 248 from mainpanel 202, to allow rotation and movement of door 234. Door 234 can alsoinclude a lock feature 250 that is configured to retain retractablespring loaded pin 246 in the retracted position. In the example shown,lock feature 250 is an arcuate notch 252 formed and edge of door 234,which is configured to receive and retain pin 248 of retractable springloaded pin 246 when pin 248 is retracted and rotated 90°.

Referring to FIGS. 15-21 , a second example top cap 300 is shown thatcan also be used with data center cabinet 10. Top cap 300 is similar totop cap 200, except that rather than having a single, integral, unitarymain panel, top cap has two separate components that are installed onbase frame 100 adjacent each other. The use of two separate componentscan reduce the risk of damage being done to top cap 300 when beinghandled, transported, or installed.

As best seen in FIGS. 15-16 , top cap 300 has a front plate 302 and aseparate rear plate 304 positioned adjacent front plate 302. Together,front plate 302 and rear plate 304 span the entire top of base frame 100of data center cabinet 10 and define a front edge 306, rear edge 308opposite front edge 306, opposing first and second side edges 310, 312extending between front edge 306 and rear edge 308, top surface 314 andbottom surface 316. Front plate 302 and rear plate 304 are both areattached to base frame 100 by screws 360 that extend through holes infront plate 302 and rear plate 304 and into base frame 100. A pair oflongitudinal side openings 318 in front plate 302 run substantiallyparallel to first and second side edges 310, 312 and are inset andspaced apart from front, rear, first side, and second side edges 306,308, 310, 312. Side openings 318 can be left open to allow the passageof cables. Alternatively, plates 220 can be secured to top cap 300 overside openings 318 (FIG. 13 ), which can be used to attach brush sealstrips to prevent thermal leakage from data center cabinet 10, attachprotection bezels 222 to cover side openings 318, or attach exhaustvents 224 to provide thermal exhaust from data center cabinet 10, asshown in FIGS. 13-14 and described above with respect of top cap 200.

Front plate 302 and rear plate 304 together also define large rearopening 326 that is also inset and spaced apart from front, rear, firstside, and second side edges 306, 308, 310, 312. Removable door 334 isidentical to removable door 234 described above, is positioned overopening 326, and is hinged to front plate 302 to allow door 334 to berotated between an open position and a closed position and to also beremoved from top cap 300. Alternatively, door 334 could also be hingedto rear plate 304. Like door 234, door 334 also has side and rearcutouts 340 in the side and rear edges of door 334, which form apertures342 between door 334 and rear plate 304 that are preferably large enoughto pass cabling and fit power outlet unit cords through. When largediameter power outlet unit plugs need to pass through apertures 342,door 334 can be rotated to an open position to allow passage. Brush sealstrips can also be installed on door 334 and/or rear plate 304 to coverapertures 342 to prevent unwanted thermal leakage.

When in the closed position, door 334 is supported by door stop flanges328 that extend from and are offset from rear plate 304 and into opening326. As best seen in FIGS. 19-21 , rear plate 304 can also have agrounding tab 330 that extends from rear plate 304 into opening 326 anda spring type grounding clip 332 mounted on grounding tab 330 to provideelectrical continuity between rear plate 304 and door 334 when door 334is in the closed position. Grounding tab 330 can be positioned slightlybelow door stop flanges 328 to provide grounding clip 332 some clearancebetween grounding tab 330 and door 334. The area of grounding tab 330under grounding clip 332 and the area of door 334 that contactsgrounding clip 332 would also not be painted or otherwise coated toprovide a metal on metal contact paths. Although one grounding tab 330is illustrated, the rear plate 304 may have a second symmetricalgrounding tab at the opposite side of the top cap.

Door 334 can also include one or more latches 244 to prevent rotationand removal of door 234 when in the closed position and a lock feature250 that is configured to retain retractable spring loaded pin 246 inthe retracted position, as shown in FIGS. 11-12 and described above withrespect to top cap 200.

Referring to FIG. 22 , base frame 100 of data center cabinet 10 is shownwith reusable and removable transport casters 400. FIG. 23 illustratesan alternative base frame of the data center cabinet. As best seen inFIGS. 24-25 , transport casters 400 each have a swivel caster 402 and asteel mounting plate 406 that is secured to swivel caster 402 bythreaded members 420, which extend from bottom surface 418 of mountingplate 406 and through corresponding holes 404 in swivel caster 402, andlock nuts 422 that are threaded onto corresponding threaded members 420.Mounting plate 406 also has mounting buttons 410 and a retractablespring pin 416 that each extend from top surface 408 of mounting plate406. Mounting buttons 410 are configured to be received and retained inkeyholes 110, 130 in bottom side-to-side beams 104, 124 of base frame100 of data center cabinet 10, as discussed in more detail below, andeach have a neck portion 412 that fits through a first portions 112, 132of corresponding keyholes 110, 130 and a head portion 414 that has alarger diameter than neck portion 412 and fits through second portions114, 134 of corresponding keyholes 110, 130, but not through firstportions 112, 132 to prevent vertical movement of removable transportcasters 400 once they are installed. Retractable spring pin 416 ismovable between retracted and extended positions and is biased towardsthe extended position in which retractable spring pin 416 extends abovetop surface 408 of mounting plate 406 and is received in lock holes 116,136 in bottom side-to-side beams 104, 124 of base frame 100 of datacenter cabinet 10, as discussed in more detail below.

Referring to FIGS. 26-28 , to receive and secure removable transportcasters 400 to base frame 100 of data center cabinet 10, bottomside-to-side beams 104, 124 each have a centrally located, generallyrectangular opening 108, 128 formed through top walls 106, 126 of bottomside-to-side beams 104, 124, which is configured to allow removabletransport casters 400 to pass through openings 108, 128. Multiplekeyholes 110, 130 are also formed in each top wall 106, 126 and, asdiscussed above, are configured to receive and retain mounting buttons410 of removable transport casters 400. As best seen in FIG. 27 , eachbottom side-to-side beam 104, 124 has a first set 160 of keyholes 110,130 located on one side of opening 108, 128 and a second set 162 ofkeyholes 110, 130 located on an opposite side of opening 108, 128, whichallows a removable transport caster 400 to be secured at each end ofbottom side-to-side beams 104, 124 and allows a single opening 108, 128to be used to install both removable transport casters 400. Lock holes116, 136 are also formed in each top wall 106, 126 and, as discussedabove, are configured to receive retractable spring pins 416 ofremovable transport casters 400. Each of the first set 160 and secondset 162 of keyholes 110, 130 have a corresponding lock hole 116, 136.

To install transport casters 400 on data center cabinet 10, data centercabinet 10 is first raised to a height that transport casters 400 canfit below top wall 106, 126 of bottom side-to-side beams 104, 124 byadjusting or rotating leveling legs 144, which allows a single person toeasily perform the installation.

A first transport caster 400 is then be inserted through opening 108 inside-to-side beam 104 until transport caster 400 is positioned below topwall 106 of side-to-side beam 104 and is moveable longitudinally alongside-to-side beam 104. Transport caster 400 is then slid alongside-to-side beam 104 towards first set 160 of keyholes 110 at a firstcorner of data center cabinet 10 until head portions 414 of mountingbuttons 410 are aligned with second portions 114 of first set 160 ofkeyholes 110. Transport caster 400 is then raised to insert mountingbuttons 410 through keyholes 110. Retractable spring pin 416 is thenmoved to the retracted position and transport caster 400 is slid furtheralong side-to-side beam 104 until retractable spring pin 416 engageslock hole 116, which will automatically move to the extended positiononce retractable spring pin 416 is aligned with lock hole 116, andmounting buttons 410 are retained in first portions 112 of keyholes 110.

The same procedure described above can be repeated to secure a secondtransport caster 400 to the other side of side-to-side beam 104, atsecond set 162 of keyholes 110, a third transport caster 400 to a firstside of side-to-side beam 124, at first set 160 of keyholes 130, and afourth transport caster 400 to a second side of side-to-side beam 124,at second set 162 of keyholes 130.

Once all transport casters 400 have been installed, data center cabinet10 is then lowered to rest on transport casters 400 by adjusting orrotating leveling legs 144 in a direction opposite that to raise datacenter cabinet 10.

To remove transport casters 400 from data center cabinet 10 once it hasbeen position, the reverse of the steps above are performed. Data centercabinet 10 is raised by rotating leveling legs 144 until transportcasters 400 no longer contact the floor. Each transport caster 400 isthen removed by moving retractable spring pins 416 to the retractedposition to disengage them from lock holes 116, 136, sliding transportcasters 400 towards openings 108, 128 until head portions 414 ofmounting buttons 410 are aligned with second portions 114, 134 ofkeyholes, 110, 130, lowering transport casters 400 to disengage mountingbuttons 410 from keyholes 110, 130, sliding transport casters 400towards the center of bottom side-to-side beams 104, 124, removingtransport casters 400 through openings 108, 128, and lowering datacenter cabinet 10 to the desired height by rotating leveling legs 144.

Alternatively, if the base frame of the cabinet does not include anopening (see FIG. 23 ), the cabinet is raised or tilted slightly to gainaccess to underneath the side to side beam. The transport casters 400are then placed under the side to side beam and installed as describedabove. To remove the transport casters 400, the cabinet would be raisedor tilted slightly to provide access to the transport casters 400. Onceaccessible, the transport casters 400 would be removed as describedabove.

As can be seen in FIG. 29 , when installed, transport casters 400 allfit within the footprint of data center cabinet 10, which helps keep themaneuverability of data center cabinet 10 unchanged, which is desirablein the narrow aisles of data centers. In addition, as seen in FIG. 30 ,transport casters 400 do not add any additional height to data centercabinet 10 than would be added with traditional factory installedcasters. This speeds up installation, because leveling legs 144 need tobe raised and lowered only slightly for a single person to perform theinstallation and removal of transport casters 400. Low profile transportcasters are also beneficial for rolling data center cabinet 10 thrulimited height doorways or passageways.

While particular embodiments of the present invention have been shownand described, it will be obvious to those skilled in the relevant artsthat changes and modifications may be made without departing from theinvention in its broader aspects. Therefore, the aim in the appendedclaims is to cover all such changes and modifications that fall withinthe true spirit and scope of the invention. The matter set forth in theforegoing description and accompanying drawings is offered by way ofillustration only and not as a limitation. The actual scope of theinvention is intended to be defined in the following claims when viewedin their proper perspective based on the prior art.

We claim:
 1. A data center cabinet, comprising: a base frame including apair of front vertical posts, a first bottom side-to-side beam and afirst top side-to-side beam positioned between and connected to the pairof front vertical posts, a pair of back vertical posts, a second bottomside-to-side beam and a second top side-to-side beam positioned betweenand connected to the pair of back vertical posts, a first pair offront-to-back beams positioned between and connected to one of the pairof front vertical posts and one of the pair of back vertical posts, anda second pair of front-to-back beams positioned between and connected tothe other of the pair of front vertical posts and the other of the pairof back vertical posts; wherein the first and second bottom side-to-sidebeams each comprise an opening configured to allow a removable transportcaster to pass through the opening, a first set of keyholes configuredto receive and retain a set of mounting buttons of a first removabletransport caster, and a second set of keyholes configured to receive andretain a set of mounting buttons of a second removable transport caster.2. The data center cabinet of claim 1, wherein the first and secondbottom side-to-side beams each comprise a first lock hole configured toreceive a retractable spring pin of the first removable transport casterand a second lock hole configured to receive a retractable spring pin ofthe second removable transport caster.
 3. The data center cabinet ofclaim 1, further comprising a first pair of adjustable leveling legsattached to the first bottom side-to-side beam and a second pair ofadjustable leveling legs attached to the second bottom side-to-sidebeam.
 4. The data center cabinet of claim 1, wherein the openings arecentrally located along the side-to-side beams.
 5. The data centercabinet of claim 1, comprising the first and second removable transportcasters, the first and second removable transport casters eachcomprising: a swivel caster; and a mounting plate secured to the swivelcaster, the mounting plate comprising a plurality of mounting buttonsextending from a top surface of the mounting plate and configured to bereceived and retained in a plurality of keyholes in the data centercabinet.
 6. The data center cabinet of claim 5, wherein the mountingplate comprises a retractable spring pin extending from the top surfaceof the mounting plate and configured to be received in a lock hole inthe data center cabinet.
 7. The data center cabinet of claim 5, whereinthe mounting plate is secured to the swivel caster by a plurality ofthreaded members extending from a bottom surface of the mounting plateand through corresponding holes in the swivel caster and a plurality oflock nuts threaded onto corresponding threaded members.
 8. The datacenter cabinet of claim 5, wherein the mounting button has neck portionand head portion, the head portion having a larger diameter than theneck portion.
 9. The data center cabinet of claim 8, wherein the neckportion is configured to fit through a first portion of a correspondingkeyhole and the head portion is configured to fit through a secondportion of the corresponding keyhole and not the first portion.
 10. Atransport caster for use with a data center cabinet, the transportcaster comprising: a swivel caster; and a mounting plate secured to theswivel caster, the mounting plate comprising a plurality of mountingbuttons extending from a top surface of the mounting plate andconfigured to be received and retained in a plurality of keyholes in thedata center cabinet.
 11. The transport caster of claim 10, wherein themounting plate comprises a retractable spring pin extending from the topsurface of the mounting plate and configured to be received in a lockhole in the data center cabinet.
 12. The transport caster of claim 10,wherein the mounting plate is secured to the swivel caster by aplurality of threaded members extending from a bottom surface of themounting plate and through corresponding holes in the swivel caster anda plurality of lock nuts threaded onto corresponding threaded members.13. The transport caster of claim 10, wherein the mounting button hasneck portion and head portion, the head portion having a larger diameterthan the neck portion.